Irène Némirovsky's last novel, written before her death in Auschwitz, caused a sensation when it was discovered in 2004. But the charge that she might have been anti-semitic - even though she was Jewish - threatens to stain her reputation. Stuart Jeffries investigates.

In 1967, Mollie Craven, the mother of a heroin addict, wrote an article in the Guardian appealing to readers to start a self-help group for addicts and their families. Now, 40 years later, Addaction is Britain's leading drug charity.